OBD fault code library
Look up any P or U code to see what it means, what causes it, the parts involved and how it gets fixed.
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Fault codes
P040B
Exhaust Gas Recirculation Temperature Sensor A Circuit Range/Performance
Generic
Auxiliary Emissions Control
Medium severity
P040C
Exhaust Gas Recirculation Temperature Sensor A Circuit Low
Generic
Auxiliary Emissions Control
Medium severity
P040F
Exhaust Gas Recirculation Temperature Sensor A/B Correlation
Generic
Auxiliary Emissions Control
Medium severity
P041C
Exhaust Gas Recirculation Temperature Sensor B Circuit Low
Generic
Auxiliary Emissions Control
Medium severity
P041E
Exhaust Gas Recirculation Temperature Sensor B Circuit Intermittent/Erratic
Generic
Auxiliary Emissions Control
Medium severity
P042B
Catalyst Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2
Generic
Auxiliary Emissions Control
Medium severity
P043C
Catalyst Temperature Sensor Circuit Low Bank 2 Sensor 2
Generic
Auxiliary Emissions Control
Medium severity
P043E
Evaporative Emission System Leak Detection Reference Orifice Low Flow
Generic
Auxiliary Emissions Control
Medium severity
P044A
Exhaust Gas Recirculation Temperature Sensor C Circuit
Generic
Auxiliary Emissions Control
Medium severity
P044E
Exhaust Gas Recirculation Temperature Sensor C Circuit Intermittent/Erratic
Generic
Auxiliary Emissions Control
Medium severity
P045B
Exhaust Gas Recirculation B Control Circuit Range/Performance
Generic
Auxiliary Emissions Control
Medium severity
P046A
Catalyst Temperature Sensor 1/2 Correlation Bank 1
Generic
Auxiliary Emissions Control
Medium severity
P046D
Exhaust Gas Recirculation Sensor A Circuit Intermittent/Erratic
Generic
Auxiliary Emissions Control
Medium severity
P047B
Exhaust Pressure Sensor B Circuit Range/Performance
Generic
Auxiliary Emissions Control
Medium severity
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